Combined gas-stove and grate



3 Sheets-Sheet V 1.

(No Model.)

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(No Model.) 3 Sheets-Sheet J. F. DONAHOE.

.GOMBINBD STOVE AND GEATE; No. 567,226. Patented Sept e w 2 J .2 \w e e\w M. WV N we w 4v -u 5 a s 7 m w e. my a- A H p re t, Wy m. 1 elm. e J& h p H N .R M w e Q ww w m I Q a 3 e x e j a .3 x Qt W W W.

3 Sheets-Sheet 3.

(No'ModeL).

J. F DONAHOB.

' UOMBINED GAS STOVE AND GRATE- a? Patented Sept. 8, 1896;

T fi a Z UNITED STATES PATENT O FICE.

JOHNF. DONAHOE, OF PAOLA, KANSAS.

COMBINED GAS-STOVE AND GRATE.

SPECIFICATION forming art of Letters Patent No. 567,226, dated September8, 1896.

r Application filed May 8, 1895. Serial No. teams. (No model.)

To all whom it may concern:

Be it known that 1, JOHN F. DONAHOE, of Paola, Miami county,'Kansas,have invented certain new and useful Improvements in a CombinedGas-Stove and Grate, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart thereof. Myinvention relates to combined gas-stoves and grates; andmy object is toprovide a structure whereby nearly all of the benefits ofan open-front stove or grate may be obtained in point of convenience,cheerfulness, and comfort, and at the same time nearly the entireheating-surface of the stove may be utilized to heat the air in the roomand cause it to circulate.

Other objects of the invention will appear in the-following description,and will be pointed out in the appended claims.

In order that the invention maybe fully understood, I will proceed todescribe it with reference to the accompanying drawings, in which-Figure 1 represents a perspective view of a structure embodying myinvention arranged as a grate and located operatively relative to theflue through which the products of combustion pass off. Fig. 2represents a vertical section of the same, taken on the line 2 2 of Fig.3. Fig. 3 represents a horizontal section taken on the line 3 3 of Fig.2. Fig. 4 represents a front view of a structure embodying my inventionarranged as a gas-stove. Fig. 5 represents a verticalsection of thesame, taken on the line 5 5 of Fig. 6 and partly broken away at itsupper corners. Fig. 6 represents a vertical section taken on the line 66 of V Fig. 5.

plate 2, near its upper end and midway between its sides, is providedwith an opening, with which communicates the rearwardlyprojectingcombustion-pipe 4., to which the usual stovepipe 5, leading to thechimney, is attached. The stove is supported at each corner by thedepending legs'6 ofthe construction shown or of any other suitable orpreferred construction.

Projecting forward from and preferably integral with the bottom 1 is thehearth 8. hearth is preferably in the form of a casting, which at itslower end rests upon the floor. This hearth must be open to permit airto pass freely through it to provide for the free circulation of air andfor the supply of the same to the mixing-chamber of the burner,hereinafter more particularly referred to. I have shown it as formed ofa series of alternating bars 9 and spaces 10, but it is to be understoodthat it may be of any ornamental configuration desired, provided that itis sufficiently open to permit air to pass freely therethrough. Thehearth is provided with the usual fender 11 near its margins. The

front plate of the structure is formedwith an enlarged opening, so as toform practically the outwardly-projecting flanges 12 at its sidemargins, the upwardly-projecting flange 13 at the junction of the hearthwith the bottom, and the depending flange 14, con- This necting the sideflanges 12 at their upper ends. The front plate also carries anoverhanging hood or deflector 15, which tends to confine the products ofcombustion and direct them on their proper course within the structure.bent upward near its margin, as shown at 17, and then curved outward anddownward to form the downwardly -dispo sed hooks 18, which snugly yetdetachably embrace the The top 16 of the structure is upper ends of theback and side plates and I the front plate, as shown most clearly inFigs. 2 and 5. Extending vertically Within the structure from the bottomplate to thetop plate are the tubes 19, which thus form verticalair-passages 20, communicating attheir upper and lower ends withopenings 21 in the said bottom and top plates. The body portions ofthese tubes are preferably of U form, and their back wall, from thebottom plate up to within a short distance of the top plate, comprises asingle vertical plate 22, which extends from side wall tosideiwall. Ashort plate 23 is employed to continue the back wall of each of saidtubes, and as said short plates are entirely independent of each otherand correspond in width to the said tubes a number of apertures 24 areformed between the upper end of the plate 22 and the top plate 16,between each pair of tubes 19, and between the end tubes 19 and the sideplates of the structure, as illustrated most clearly in Figs. 5 and 6.

Rearward of the apertures or openings 21, which communicate with thepassages 20, the top plate 16 and the bottom plate 1 are provided withregistering elongated apertures 25. These apertures are connected by avertical tube 26, so as to form the vertical passage 27, which opens atits opposite ends below the bottom plate and above the top plate of thestructure, as shown most clearly in Fig. 2. The back plate of the tube26 is extended outwardly to the side plates 3, as shown at 28, (seeFigs. 3 and 5,) and near its lower'corners is cutaway to form theapertures 29. The arrangement of the vertical tube 26, asshowmprovides avertical passage 30 between said tube and the back plate 22 of the tubes19, and said passage 30 is enlarged. at each side ofsaid tube 26,asshown at 30. The passage 30, with its enlargements 30*, communicateswith the space in front of the backplate 22 and external of the tubes 19through the apertures 24, hereinbefore referred: to, and saidenlargements 3O" also. communicate through the passages 29 withthe lowerendof a vertical passage 31, formed between the back plate of the tube26 and the back plate proper, 2, of the structure. The upper and lowerends of this passage being closed, as shown most clearly in Figs. 2, 5,and 6,.compels the products of combustion, as traced by the flight ofarrows, to escape by way of the pipe 4 and the pipe 5 to the chimney.The upper end and the lower end of the passage30 and its enlargements 3Oare also closed by the top plate 16 and the bottom plate 1, asshown,clearly in the figures above specified, and the products of combustionare compelled to take the course indicatedby the flight of. arrows, Fig.6. Arranged contiguous to the front side and lower ends of the tubes 19is the transversely-extending pipe 32,, provided with numerous burneropenings or orifices 33,. and provided also with branch pipes 34, whichare also provided with burner openings or, orifices 33. These branchpipes are arrangedbetween the said tubes 19 and the side plates of thestructure and extend upwardly and inwardly from the pipe 32 at aboutanangle of forty-five degrees. Oommunicating centrally, preferably, withthe burner-pipe 32 is the pipe 36, which terminates at its lower end ina flaring mixingchamber wherein the gas discharged from the pipe 37mingleswith sufficient air to support combustion. This burnerconstruction. is of the ordinaryFBunsen type, and forms no part of myinvention. Therefore I deem it unnecessary to describe and illustrateits detail construction.

The pipe 37 is controlled by an ordinary needle-valve, (not shown,) andthe stem of the same projects beyond the hearth and is provided with theusual hand-wheel 39, by which the amount of gas fed to the burner isregulated. The pipe 37, controlled by said valve, is supplied from ameter or other source of supply by way of the pipe 40, or in any othersuitable or preferred manner, or said pipe may be connected directly toa gas-jet by a flexible tube, (not shown,) if desired. The structurethus described, if provided with an ornamental top of open-workconstruction, as shown upon Sheet 3 of the drawings, will form a stove,which may be placed at any required point in the room and connected withthe chimney by stovepipes in the usual manner. The said removable top ispreferably in the form of a casting comprising an annular base portion,corresponding in contour with the top plate-of the structure and formedwith an outwardly-projecting flange 41 to rest upon thedown-wardly-disposed hooks 18 of the top plate, and the dependingflanges 42 to fit snugly against the vertical portions 17 of said topplate to prevent lateral displacem ent, the curved andornamentally-contoured bars 43, which are arranged a slight distanceapart to permit the air to pass freely between them, and the ornamentalvase or figure 44, projecting centrally upward from the said portioncomposed of the bars 43.

The burner is preferably covered throughout with asbestos or equivalentmaterial, so that in operation a warm and. cheerful glow will beapparent without the objectionable glare of the bright flame produced bythe burning of gas. This, however, does not form a part of my inventionand is not essential to its successful operation. To illustrate theburner more clearly, the asbestos covering is omitted.

In operation the products of combustionfrom the burner pass upwardexternally of the tubes 19 and are caused by the action of the draft andthe deflector or hood. 15 to pass rearwardly through the apertures oropenings 24, hereinbefore referred to, into the upper end of the passage30 and the enlargements 30 thereof. then pass vertically downward andinto the passage 31 by way of the apertures 29, and, rising in saidpassage, escape by way of the pipes 4 and 5, as hercinbefore explained.Thus it will be seen that the heat and products of combustion must takea tortuous course to escape, and in so doing are held in contact for aconsiderable length of time with the air-tubes 19 and 27, in factentirely surround said air-tubes, and also come in contact with the sideplates and back plate of the stove, so that the entire surface of thestove serves as a heat-radiator, and the air within the tubes 19 and 26,quickly becoming heated, rises-in the direction indicated by the flightof featherless arrows, Fig. 2, and escapes through the open-work cap orcover above the top plate 16 and radiates through out the room. The hotair thus continually radiating is continuously replaced by cold air,

Said products of combustion so that a constant and complete circulationof air within the room is maintained while the stove is in service.

With all of the gas-stoves with which I am familiar at present in usethe products of combustion are either discharged into the room or thegreater part of the heat generated is conveyed away through the combustion-flues. The ornamental cover upon the stove is shown as formed ofalternating bars and spaces to correspond with the construction of thehearth, but it is to be understood, like the hearth, that it may be ofany suitable or preferred open-work construction.

When the structure above described, the cover being omitted, is to beemployed as a grate, it is inclosed at all sides except the front by acasing of corresponding configuration. This casing comprises the backwall 41*, the side walls 42, the upper margins of which incline upwardlyand forwardly, preferably, from said back wall, the top wall 43 whichinclines with the upper margins of and connects said side walls with theback wall, and an open-work front plate 44. This open-work front platepreferably fits snugly down upon the upper side of thedownwardlydisposed hooks 18 of the top plate 16, as shown clearly inFigs. 1 and 2. In this case also the front plate 44 of open-workconstruction is shown as of alternating bars 45 and spaces 46, and mayalso be of any other suitable or preferred open-work construction. Thesaid casing is of such size that an air-space 47 is formed between theback plate 2 of the structure and the back wall 41 of the casing, andthat air-spaces 48 are provided between its side walls 42 and the sideplates of said structure, so as to provide additional passages whereinthe air may be heated by the external surface of the inclosed structurehereinbefore described. The air heated in such passages circulates withthat passing through the tubes 19 and 26 through the room by way of theopen-work face-plate 44, as will be understood. The back wall 41 of saidcasing of course is provided with an opening, through which thecombustion-pipe 4 projects. To secure said inclosed structure and saidcasing in operative position relative to each other firmly yetdetachably, the outer margins of the flanges 12 of the faceplate arebent to form the inwardly-disposed hooks 12*, which slidingly engage thelaterally-projecting flanges 49, formed at the front ends of the sidewalls42" of said casing, as shown most clearly in Fig. 3. When saidgrate is placed in operative position, the casing fits snugly within thegrate-opening 50 of the flue or chimney, and the short pipe or elbow 5projects vertically upward into the flue 51, though, as will beunderstood, said short pipe or elbow may be dispensed with. The actionof the grate is the same as that previously de-' scribed the products ofcombustion, passing up through the flue or chimney and the heated pureair of the room keeping up a continuous circulation.

It is to be understood that slight changes in the form, proportion, andarrangement of the parts may be resorted to without depart ing from theessential spirit and scope or sacrificing any of. the advantages of myinvention.

Having thus described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a combined gas-stove and grate, the combination of top and bottomplates provided with a series of registering apertures, side plates anda back plate connecting the top and bottom plates, a series ofindependent air-tubes connecting the top and bottom plates andregistering with the apertures thereof, a plate 22, connecting the rearmargins of said tubes and extending from side plate to side plate andfrom the bottom upward to within a short distance of the top plate toform openings and passages between the sides of the said air-tubes, anda burner above the bottom plate and provided with branches which projectinto the passages between the air-tubes, substantially as shown anddescribed.

2. In a combined gas-stove and grate, top and bottom plates, side platesand back plates connected together as shown, and supported upon legsabove the floor, air-tubes passing through the top and bottom plates, aburner, an open-front casing surrounding the structure and extendingdown to the floor and over the top plate, and a combustion-pipeextending through registering apertures in theback of the casing and theback of the stove structure proper, substantially as shown anddescribed. In testimony whereof I affix mysignature in the presence oftwo witnesses.

JOHN F. DONAHOE. Witnesses:

J W. SPANABLE, WM. ORowELL.

